Refactor registration and dashboard features to support invite codes and Bunny uploads

- Moved registration logic to a new client component for better separation of concerns.
- Integrated invite code requirement based on feature flags in the registration process.
- Enhanced dashboard functionality to conditionally enable Bunny uploads based on feature flags.
- Updated various components and API routes to check for Bunny uploads and Stripe billing feature flags.
- Added new feature flag utilities for managing feature toggles in the application.

app/api/videos/[videoId]/assets/bunny-init/route.ts

@@ -10,6 +10,7 @@ import {
   enforceGuestUploadQuota,
   verifyGuestUploadToken,
 } from '@/lib/guest-upload-token';
+import { isBunnyUploadsFeatureEnabled } from '@/lib/feature-flags';
 import { getShareSessionFromRequest } from '@/lib/share-session';
 import { getVideoAssetAccessContext, SAFE_BUNNY_VIDEO_ID } from '@/lib/video-assets';
 
@@ -30,6 +31,10 @@ export async function POST(request: NextRequest, { params }: RouteParams) {
     const title = typeof body?.title === 'string' ? body.title.trim() : '';
     if (!title) return apiErrors.badRequest('Title is required');
 
+    if (!isBunnyUploadsFeatureEnabled()) {
+      return apiErrors.badRequest('Direct uploads are disabled by this host');
+    }
+
     const shareSession = getShareSessionFromRequest(request, context.video.id);
     if (!context.viewerUserId) {
       const quotaError = await enforceGuestUploadQuota(request, context.video.id, 'bunny', shareSession?.token ?? null);